Some platforms add/use URI params in the user portion of the URI.

I was just reminded of this this week with Global Crossing:

sip:+18005551212;npdi=yes@0.0.0.0

That is (of course) the number portability display indicator... ;)

Anyways, I had to rewrite the URI using OpenSIPS to strip the
";npdi=yes".  I imagine you could do the same but I'm not sure how in
FreeSWITCH.